Equipment wash water treatment: wash racks, rail, vehicle/trucking, mass transit Recycle systems (closed loop, water reuse) Other applications

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1 INDUSTRIAL & REMEDIATION THE STORMWATER MANAGEMENT ELECTROCOAGULATION SYSTEM TM THE STORMWATER MANAGEMENT ELECTROCOAGULATION SYSTEM EC SYSTEMTM The Stormwater Management (EC System ) is a highly effective technology for removal of emulsified oils, TPH, suspended solids, and heavy metals from industrial wastewater and wash water resulting in clean water for reuse or discharge. Using a unique process of passing a controlled electrical current through industrial wastewater to aid in the removal of contaminants (electrocoagulation), the EC System represents a major advancement in water treatment technology, as only one system is required to remove contaminants under a range of influent concentrations and compositions. The EC System complements the Stormwater Management StormFilter by generating consistent, high-quality effluent from higher-strength wastewater and, in many instances, does not require the use of chemicals. Packaged with on-board automation, the EC System is fully automatic, reducing maintenance by up to 95%. Most importantly, the system provides economical onsite treatment of complex waste streams. APPLICATIONS Marine wastewater: hull wash water, hydroblast water, bilge water Removal of tannins and lignins, pigments, colloidal solids Wood treating runoff Equipment wash water treatment: wash racks, rail, vehicle/trucking, mass transit Recycle systems (closed loop, water reuse) Other applications 10 GPM System for Shipyard Hydroblast Water Treatment Self-contained Configuration BENEFITS With systems available to treat 5 gpm to 65 gpm, the Stormwater Management Electrocoagulation System: Meets discharge requirements Recycles water for reuse (zero discharge) Removes the need for chemicals (other than ph control) Processes multiple contaminants Reduces cradle-to-grave liabilities The EC System also offers: Built-in redundancy and remote troubleshooting capabilities Minimal operator attention Low maintenance Low operating cost Quick return on investment Availability in stand-alone or self-contained configurations B NE Airport Way, Portland, OR T F W stormwaterinc.com

2 INDUSTRIAL & REMEDIATION THE STORMWATER MANAGEMENT ELECTROCOAGULATION SYSTEM TM EC SYSTEM CELL OPERATION Pollutant removal in the EC System process begins when contaminated water is exposed to electrocytic cells. As water passes through these cells, it is exposed to a controlled electrical current and becomes charged. Once charged, the suspended contaminant particles bond together like small magnets and form larger masses. Any masses comprised of coagulated material are quickly removed, while masses comprised of heavy solids settle to the bottom. What is left is a clear phase of water with less contaminants. This process is effective on any size of suspended solids including sub-micron particles such as FEATURES The EC System process is highly effective on complex industrial waste water. It is a programmed technology, so no periodic maintenance is required. Any wetting agents (soaps, detergents) will remain in the water for reuse. It is effective on suspended solids (of any micron size), emulsified/suspended petroleum and heavy metals. pigments and tannins. The clean water is then sent to a separation unit where any remaining floc is removed from the clean water. Electrocytic Cell Polluted Water Clean Water Electrocytic Cell Operation It is an excellent technology for recycled water applications, as suspended solids are removed from the water rather than passed through and allowed to build up in the clean (reuse) water tank. It may be installed alone for wastewater applications or in combination with the StormGate and StormFilter for commingled stormwater and wastewater applications. Before During After TYPICAL PERFORMANCE * Parameter Influent (mg/l) Effluent (mg/l) Removal Efficiency Total Lead % Total Copper % *Lab test data taken from various EC System configurations. Total Zinc BOD Diesel % 85% 99% Total Oil and Grease % ABOUT STORMWATER MANAGEMENT INC. Stormwater Management Inc. is the leading manufacturer of stormwater treatment systems for industrial applications including the StormScreen, StormGate Separator, the Stormwater Management, and our flagship product, the Stormwater Management StormFilter. Stormwater Management Inc. serves the industrial and remediation market by providing reliability and flexibility to meet environmental permit requirements. We understand the changing regulatory environment and offer complete sales and engineering support to help you navigate the sea of options. Our products are used in many industry sectors to capture and remove pollutants such as suspended solids, oil and grease, dissolved metals, organics and nutrients from stormwater runoff wastewater discharges. CONTACT Technical Sales Stormwater Management Inc. Toll Free: Local: Fax: B NE Airport Way, Portland, OR T F W stormwaterinc.com

3 Wash water treatment Stormwater treatment Industrial water recycling Treat and Discharge or Recycle For a reduction/removal of: Metals, suspended solids, petroleum, oils, tannin (color), clay, dirt, latex, molds, algae Benefits: Totally enclosed treatment No chemicals to add Fully automated system 30 to 40 GPM system for shipyard hydro-blast water treatment Applications: Marine applications hull washing, hydro-blast water treatment, bilge water Log deck runoff color removal Vehicle/truck recycle systems Heavy equipment washing Citrus wash water recycling Military applications Stormwater treatment Other applications

4 The Stormwater Management (EC System ) uses a unique process of passing a controlled electrical current through industrial wastewater or stormwater to aid in the removal of contaminants. The EC System effectively removes emulsified oils, TPH, suspended solids and heavy metals resulting in clean water for reuse or discharge. Before During After The EC System represents a major advancement in water treatment technology. The robust treatment allows one system to remove contaminants under a range of influent compositions. The EC System complements the Stormwater Management StormFilter by generating consistent high quality effluent on higher strength wastewater without the use of chemicals. Packaged with on-board automation, the EC System is fully automatic, reducing maintenance by up to 95%. Most importantly, the system provides economical onsite treatment of complex waste streams. Benefits of EC System: Meets discharge requirements Ability to recycle water for reuse (zero discharge) Minimal operator attention Low maintenance (self-cleaning plates) Reduces sludge volume No chemicals required (other than ph control) Ability to process multiple contaminants Low operating cost Quick return on investment Reduces cradle-to-grave liabilities Applications: Shipyard / Boatyards Removal of copper based paint, heavy metals, turbidity; bilge water Boat / Marine Washing Marine debris; light oils; copper based paint; color Heavy Equipment Washing Solids removal (red clay and heavy solids); oils and greases Car / Truck Washing and Detail Emulsified oils & greases; suspended and dissolved solids Airplane Refurbishment Heavy metals removal (chrome, cadmium and zinc) Military Applications Removal of TPH; Oil and grease; heavy metals from tank water Wood Products, Log Decks Removal hydraulic oils; tannin; copper; chrome; and arsenic Citrus Packing House Treatment of citrus wash water Ground Water Remediation Removal of TPH; copper; chrome; and arsenic Golf Course Equipment wash water treatment (hydrocarbons)

5 The Stormwater Management (EC System ) uses a unique process of passing a controlled electrical current through industrial wastewater and high strength stormwater to aid in the removal of contaminants. The EC System effectively removes emulsified oils, TPH, suspended solids and heavy metals resulting in clean water for reuse or discharge. The EC System represents a major advancement in water treatment technology. The robust treatment allows one system to remove contaminants under a range of influent compositions. The EC System complements the Stormwater Management StormFilter by generating consistent high quality effluent on higher strength wastewater without the use of chemicals. Packaged with on-board automation, the EC System is fully automatic reducing maintenance by up to 95%. Most importantly, the system provides economical onsite treatment of complex waste streams. Benefits of a containerized EC System: Ability to locate equipment in a high cube cargo container Conserve valuable floor space System comes pre-plumbed and wired with breaker panel Fully insulated Two man-doors are standard for convenient entrance and exit Comes wired with lighting and 120 volt electrical outlets Available with electric heating with thermostatic control Available with air conditioning Standard container length is 40 feet Optional lengths of 45 and 48 feet available to accommodate additional equipment such as pressure washers or storage EC Systems can be installed in a cargo container, which can be placed in a remote outside location.

6 20 GPM system installed in 45 ft. container Specifications: Container package: 45 ft. aluminum ocean cargo container, 2 man doors, heater/air conditioner, insulation, container vent, electrical breaker box, lighting and AC outlets. EC System: 500 gal. input tank, gpm treatment system, 500 gal. separator tank, 1000 gallon settling tank, 1000 gallon clean tank, 1000 gal. sludge accumulation tank, ph control system. Recycle option: Submersible pressure pump, 80 gallon fiberglass pressure tank, CD ozone for bacteria control.

7 In Figure 1, waste water containing suspended solids (of any size) are charged through an electrolytic cell. Once charged, the particles bond together like small magnets and form mass. The emulsified petroleum elements will float while the heavy solids will settle to the bottom. What is left is a clear phase of water, less contaminants. This process is effective on any size of suspended solids including sub micron particles such as dye and log deck leachate. Figure 2 illustrates the Stormwater Management (EC System ) process with soap in the water. The effect that soap and detergents have on dirt and oil is to reduce the particle size causing a greater number of smaller particles/droplets to suspend in water. Since the EC System process is effective on any size particles/droplets, the same outcome is derived from waste water containing soap and detergents as in simple waste streams. This process provides clean water for recycle purposes without the risk of impacting screen, sand, and carbon filters. Applications: The EC System is highly effective on complex industrial waste water. It is a programmed technology, so no periodic maintenance is required. Any wetting agents (soaps, detergents) will remain in the water for reuse. It is an excellent technology for recycled water applications, as the suspended solids are removed from the water rather than passed through and allowed to build up in the clean (reuse) water tank. Its recommended placement is after the StormFilter or oil/water separator. It is effective on suspended solids (of any micron size), emulsified/suspended petroleum and heavy metals. It is recommended that a StormFilter or StormGate Separator be installed upstream of the EC System to remove the free oil.

8 General Flow Diagram for Generic Applications Using the Stormwater Management (EC System ) Reference document: Flow Diagram Influent tank: Water collects in the influent tank and is processed through the system by two process pumps. The pumps are managed by the Programmable Logic Controllers and use floats to detect the water level. ph is automatically adjusted in the influent tank using a digital ph controller. Cell Assembly: The water is processed through the system using a dual configuration. There are two sump pumps (1) located inside the influent tank. These pumps are elevated slightly off the bottom to prevent any heavy solids from entering the system. The pumps are managed by the Programmable Logic Controllers (PLC) and floats are used to detect water levels. Water flows through electro-cells (2) to expose the water and contaminants to the EC System process. There are 2 banks of cells providing adequate charge to separate oil; grease, metals, and suspended solids. Separation Assembly: Once the contaminated water is charged, the water passes through a foam blocker/preclairfier (3). This process separates most of the contaminants and all of the foam accumulation. The dirty water and foam is sent to the sludge accumulation tank (6). Clean water is sent to the floc separation tank (4) where any remaining floc is removed from the clean water. The floc accumulates at the bottom of the tank (4). The floc accumulation is periodically pumped, under program control, to the sludge accumulation tank (6). Clean (reusable) water flows to the effluent tank (5). All of the pumps in the separation assembly are under program control. Effluent tank (clean tank): The effluent tank (5) receives clean water from the floc separation tank (4) and continues to fill until all the water is processed from the influent tank (1). Any excess water is sent to the evaporation system or discharged to sewer. There are floats in the effluent tank (5) to provide feedback to the PLCs. The entire operation is under program control. Pressure system: There are pressure pumps that pull from the effluent tank (5) to provide pressurized water to the pressure tank (8). Some systems will use submersible pumps. The pressure pumps provide water to the hose bibs/customer reuse water (9) was well as the ozone system (11) (if installed). The pressure tank (8) is a fiberglass wound tank(s) that will not corrode under the harsh conditions of ozone and recycled water. The pressure system provides 50 psi recycled water to the customer application.

9 Ozone Injection: Pressurized water from the pressure tank (8) passes through the ozone water injection unit (11). Here, ozone gas produced by the ozone generator is mixed with the water. The ozonated water is injected into the pre-clarifier tank (3). All of the water in the system is recycled through the ozonation process. This will prevent any bacterial buildup from occurring in any of the process tanks. The entire pressure system and ozonation process is managed by the PLCs under program control and requires on intervention. Evaporation system: There are floats in the influent tank (1) as well as the effluent tank (5) that monitor the liquid level and provide control for the entire system as well as the evaporator (12). The evaporator fills when water is ready for processing and shuts down when the water in the system is at a proper level. Sludge Accumulation Tank: Sludge accumulation from the system is pumped under program control to the sludge accumulation tank (6). This is where the sludge is dewatered and awaits disposal/removal. There are many variations to this process but in general, the system purges sludge automatically under program control. Control Panel: The control panels (12) are NEMA 4 enclosures that contain the required PLCs and automation equipment. In addition, the DC power supplies that provide the required DC voltage and current to the electrolytic cells that are housed beneath the control panel assembly. Summary: The EC System is completely automated and requires no preventative maintenance. The electrolytic cells are consumable items and require replacing periodically. In general, replacement is between 3 months and 1 year. The ongoing cost of operation is $0.002 to $0.005 per gallon ($2 to $5 per thousand gallons) and includes both electrical costs and cell replacements costs. These costs do not include sewage costs or evaporation costs. For additional information please contact Stormwater Management at

10 EC System PROCESS FLOW DIAGRAM Ozone Generator 11 ph Adjust System Cell Assembly Separation Process Ozone Injection System Foam Influent Tank 2 Foam Blocker/ Pre-Clarifier Floc Separation 4 Effluent Tank (clean tank) 5 10 X Add Water 8 Pressure Tank Pump 1 Pump 3 Sludge Pump Sludge Pump 7 Sludge Sludge Pressure Pump 9 To Hose Bib Power and Control Panel (automation) 12 Sludge Accumulation Tank 6 Evaporation System Landa WB/HBG 12 Sewer Project: (Typical 20 gpm) Detail: Flow Diagram Date: Prepared By: